David h



v .7 W 7. am? W a a M w 2 wf w www Lw y f i www# l M45/793x AM.PHOTOLLITHO. 0, N.Y. (DSEDRN ES PROCESS) i @eine tats datent @HirtLetters Puf/mt lVo. 67,981, dated Ang/11st 20, ISST.

IMPROVEMENT IN PEOTOGRAPHIG APPARATUS.

w @La .dgthult referat tu in these itttas zitnit :uit matting tutt vuttigt szniu.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, DAVID H. I'IoUsroN, of Cambria, in tl have inventednew and useful im e that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeusc the saine, reference being had to the accompanying drawings, formingpart of this specification.

This invention relates to improvements in the apparatus used inphotographie manipulation,and has for its objects, first, the carrying alarge number of prepared sensitive plates in a single frame, at tlincreasing the portability of the equipment of the photographer; fromthe sensitive plate up to the very moment it is to be exposed, of asingle frame, 'which I ea ic county of Columbia, and Stute of Wisconsin.provelncnts in Photographic Apparatus; und I do hereby dec 1r und icsume time second, the more complete exclusion of light and afterexposure; third, the substitution ll a. carryingframe, for numerouscarrying-frames which are entirely dispensed with; fourth, the automaticadjustment of the sensitive plate in the camera, and returning the suineto the carrying-frame after exposure; fifth, simplifying themanipulations of the photographie process; and, sixth, avoidance ofactinic action.

Figure I is a side View o upon it ready for use.

Figure 2 is a-transversc vertical sect In the accompanying drawings*- ef my improved apparatus, showing the camera with my earryinp--`rameadJnsted ien at the lino u: fr, showing the frame adjusted on thecamera. Figure 3 is a vertical longitudinal section at the line yy,

showing the sensitive plate in place to bc exposed. Figure 4 is ahorizontal section at the line 2 showing tl Figure 5 shows the diaphragmdetached from the camera.

The same letters and figures refer to the same parts in nl A A A. A isthe fralneworkof the camera; l' B B the framework of my carrying-frame.O is a cord for slinging the apparatus attached tothe foot ef the cameraat c, and passes through the eye c. A similar cord (not shown) isattachedin a similar manner to the opposite side ofthe camera. Theinstrument may be furnished with any other appropriate means forslinging the same. A diaphragm, D, movable by means of the thumb-key (Z,opens the eye-holes E, or shuts oft' the light, as desired. The groundglass F F, on which the object or view is to be focused is pressed rmlyin place against the foetfund the supportsf, and 4, by the S spring G,attached to it by the rivets g g, or by any other appropriate method,and to the door of the camera by thcbolts g', and, by a narrow strip ofbrass, gg, or other suitable material, stretched across its foot as abrace, and bolted to the floor ofthe camera on both sides of the springG, as shown in the drawing, or any other appropriate mode of attachmentmay be employed, so as to preserve the elasticity ofthe spring G. Theglass F may be of yellow or orange-Colored glass, to absorb the actinicrays and prevent their being reieeted back upon the sensitive plate, II,figs. 1, 3, and 4, is a lever, whose fulcrum is at 7l, secured to thebracket I by the bolt 7L, which may pass through the lidof the camera N,assisting to secure the latter'. The ground glass F is connected withthe short arm Lvof the lever II by awirc, f", or by any otherappropriate method, in such manner that by pressing on the long arm ofthe lever II the pressure ofthe spring G is overcome, and the groundglass F is retired, so as to allow the sensitive plate to be receivedbetween it and the foot ,7" and supports j", as shown in figs. 3 and 4,as hereafter more fully described. L is a sliding frame, bearing thelenses in the usual manner, but sliding horizontally, and carrying twogrooves, into which projections lit from the foot and lid of the camera,as shown at Z', figs. l and 3. M, figs. l, and il, is a lever, by whichthe sliding frame Ii is securely bolted in place, or the same object maybe obtained by any of the other well-known appropriate methods. N is thelid of the camera, having a transverse slit or slot, U, figs. 2 and 3,through which the sensitive plate K is allowed to fall from theearrying-frame, as hereinafter described. The lidN overlaps the cameraat the sides, as shown at n n', fig. 2, and carries a notched or groovedand numbered scale, l grooves or notches will be placed upon the iesensitive olnte in the same iosition in iig. x4

l the drawings,

2, 3, die., as shown in iig. l. The scale, beginning from the slot U, ate. distance from it equal to the thickness ofthe end of the framework Lofthe carrying-frame l?, and the distance ofthe notches will bedetermined from dimensions on the carrying-frame, as hereafterdescribed. The le e. little more than halfthe length of the camera., andis divided by dwarf partitions Q in-its interior into as manycompartments for sensitive plates as it can carry, not exceeding innumber the number of the scale on the lid N. A slip, R, of brass, imentA Q, and the scrcw-keys numbe ugth of the earryingsframe B isgrooves upon or of suitable material, is secured bythe pin r in eachcompartled l, 2, 3, die., tig. 1, corresponding with the numbers on thescale on the 4 stesi lid N, press, when in action, the slips R againstthe sensitive plates K, k k k' holding the latter firmly secured u theirseveral compartments Q Q, and when withdrawn so that the slip R nolonger presses against theplatcs K K, leave the latter free tofallthrough the slot U, as hereinafter described, or the plate to beremoved, at the pleasure of the operator. The carrying-i`rame, and. themeans here shown for securing the sensitive plat-cs, may be applied tosecure microscopic and stereoscopic slides or pictures in compartmentsin cases andboxes for travelling. The distance between each groove ornotch on the scale is equal to the width of a partition and compartmentof the carrying-box jointly, or, which is the same, to the horizontaldista-nee ofitwo consecutive screw-keys. If, as in the drawing, thescale is numbered from ieft to right, the screw-keys and compartments ofthe carrying-frame will be numbered from right to left. The reason forthis arrangement will be more apparent when Iproceed to describe themode in which my apparatus is used. The carrying-frame B bears a groove,b', fig. 2, at each side, itting into the overlapping sides oi' the lidN. O, dgs. l and 2, is a lever, secured to the side of thecarrying-frame by the .bolt or fulcrum o, and, when raised, its smallarm o lifts the catch p of the spring P eut of the groove, and enablesthe carrying-frame to slide along the lid N. When the arm O is loweredthe small arm o is withdrawn, and the catchp falls into the first grooveleft behind by the carrying-frame in its passage along the lid N. n iig.1 the catch p is shown in notch 4. The section, iig. Q, being shownthrough the slot'U, cuts through -the carryingsframe at plate orcompartment 4, and the screw-key No. 4 is shown in action, tig. 2.holding the sensitive platre K in its compartment in the carryingframe.

I now proceed to describe the mode in which my improved photographicapparatus is to be employed.

The keys numbered l, 2, 3, dre., on the carrying-frame B, being loosenedby a halt` turn to the left, slip a prepared sensitive plate, K It, intoeach compartment Q until the frame i3 contains as many plates as viewsare desired. Then, by a half turn'of each key to the right, press theslips B, againstl the plates, securing the latter in the frame B. Slidethe carrying-frame B by its grooves b along the lid N until the catch pof the spring P falls into one of the notches or grooves carried on theoverlapping portion of the lid N. The eye holes E being closed bythediaphragm D, and the object-lenses inserted in the apertures and closed,the instrument is ready for use, and may be carried about with perfectsafety. When desired to take a picture, having placed the camera on itsstand, the carrying-frame being ixedupon it as above described, open theeye-holes by turning the diaphragm D by a quarter turn of the thumb-keyd, and focus in the usual manner. Close the eye-holes E by anotherquarter turn of the diaphragm D. Now raise the small lever O so that thearm o raises the catch p of the spring P out of the notch or groove intowhich it fell, and slide the carrying-frame unt-il the end b passes thegroove of the number of the plate next before the one it is intended toexpose. Lower the lever O, and continue to slide the carrying-frame Buntil thee-atcb p falls into the next groove, in the drawing No. 4. Givethe screw-key, No. 4 in the drawing, of the same number, a turn and ahaii` to the left, thereby releasing the slip R from lthe plate K, andleaving the latter loose in its compartment over the` slot U,` throughwhich it falls, and rests on the ground glass F. Press with the thumb onthe lever -H at the back of the camera, thereby drawing back the groundglass F, and allowing the sensitive plate K to fall into the camerainfront of the ground glass F. Release the lever H,'when the s spring` Gwill press forward the ground glass F, and the sensitive plate K'will bermly held in place between the ground glass F and the foot f andsupports f, as shown in figs. 3 and 4. Having exposed the plate, shut o'the light from the lens, and, pressing on the lever H, turn the cameraover until the plate drops back into the old compartment Q in thecarrying-frame B. Give a turn and a halt` to its proper screw-key, No. 4in the drawing, when the plate will be again secured in thecarrying-frame B. Care must be taken not to screw up the glass tootightly, lest the glass should break oir the frame be strained. New turnthe camera right side up upon the stand, and another view can be takenby sliding the carrying-frame, as before, until the catch p falls intothe groove or notch of the number of the plate it is desired to expose,and repeating the process as described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. rl'he securing the ground glass F by the s spring G, movable by meansof the lever H, substantially as described.

2. Securing the sensitive plate K in place when exposed in front of .theground glass F, iu the manner and by the means substantially asdescribed.

3. The groovcd and numbered scale carried on the lid of the camera,substantially as described.

4. The employment of orange or yellow-colored glass, on which to focusthe object-or'view, in manner and for the purposes substantially asdescribed.'

5. The construction of the diaphragm D, as herein set forth for thepurpose specified.

6. The employment of the keys to secure the sensitive plate in place inthe carrying-frame, with or without the slips R, substantially asdescribed.

7. The application of the spring G for securing the sensitive plate inthe camera, substantially as described.Y

8. The employment of `an adjustable spring at oneor both ends ofthesensitive plate, whereby the same is secured or loosened at pleasure inthe carrying-frame, substantially as described.

9. rlhe application ot' the spring P and lever O as attached to thecarrying-box, substantially as and for the objects desired.

10. The carrying-frame B, 'constructed as described, when combined withthe camera A, as and for the purpose specified. l

` DAVID H; HOUSTON.

Witnesses:

R. W. ROBERTS. "W. L CLARK. Y

